[ANGLÈS] Final users and operators have been affected by the arriving of the Digital Terrestrial Television (DTT), even television manufacturers have been forced to include a receiver in all their devices which permit the final users tuning much more TV channels than some years ago. The larger number of TV channels have forced a change in its broadcasting, the development of a new technology and a new way of understanding the DVB-T networks, the stations involved and their requirements. It is necessary to develop a new method which will permit, from the point of view of broadcasting planning, if some station will be able to be a gapfiller or not. That point has been the main key for implement the new DVB-T networks. Probably, the most important difference with the analog television has been the necessity of transmitting the main signal in the same frequency as it has been received, and all the restrictions caused by this factor. The project will expose the method, the theoretical results obtained, its level of success with several measurements in several stations across Spain and its economical impact in the deployment of a real DVB-T network as well